Die for the manufacture of tiles.



" P. McG. McBEAN.

DIE FOR THE MANUFACTURE OF TILES.

APPLICATION FILED MAY 17, I915.

Patented May 23, 1916.

. D IN VENTO R 429592 777? 'wea'iz,

State of California,

faeture of 'liles, of

PETER MUG. MQBEAN, OF SAN FRANCISCO, CALIFORNIA.

DIE ronrnn MANUFACTURE or TILES.

Patented May 23, 1916.

inner surface of the part A is made cylin- 118L254. Specification of Letters Patent.

Application filed May 17, 1915. Serial No. 28,509.

To all whom it may concern Be it known that I, PETER MoG. MoBnAn,

a citizen of the United States, residing in the city and county of San Francisco and have invented new and useful Improvements in Dies for the Manuwhich the following is a. specification.

This invention relates to improvements in LO-dies for the formation of plastic materials into desired shapes, and designed to multiply and improve the stability.

The invention consists of a die and core of such form, that a plurality of molded 16 articles are produced at a single operation,

core-and with a device for ,scoring grooves along which the articles may be easily separated,

either before or after being baked.

It also comprises details of construction which will be more fully explained by reference to the accompanying drawings, in

which,-

Figure 1 is a sectional view of die and the core. Fig. 2 is an end view showing die, intermediate form. Fig. 3 is a perspective view of the plastic material or f tile after it has emerged from the die and "been cut oif to the desired length. Fig. at is a-det'ail showing score knives on die and core. Fig. 5 is a detail showing score marks made on the plastic material as it emerges from the die.

In the manufacture of tiles and earthen ware pipes, and numerous other clay products, it is customary to force the clay or other plastic material through dies of the desired shape, under heavy pressure, and the completed product is afterward kiln fired or baked. Any increase in production must be madeby increasing the number of dies used. r i v This invention is designed to provide a die to form a number of segments at a single operation such tiles having such a shape that they, when separated along the score marks or 'grooveswvill nest perfectly, but which may be retained together until baked, in order to prevent them from warping and becoming misshapen, after leaving the die.

As shown, A is the outer member, usually made of metal of great strength so as to resist pressure, and B is the core. The space C between these parts re resents the shape of'the article to be pro need. The

' danger of drical. The core 13, has its periphery formed of a plurality of segmental arcs of a curvature eccentric to that of the cylinder.

A, so that the space to be filled, and the resulting product will be a number of crescent shapes, as shown in Figs, 2 and 3-. At the junction and thinnest part of each sec- ;t1on scoring knives 2 are fixed in the. die, so that when the plastic material is forced through the die, these score knives will form grooves 3, along which the segments may be easlly separated before or after baking. By retaining the structure complete and undrvided aftrir its while still in a retain the shape and prevent it front Warping, and becoming misshapen. befeire or during baking, the grooves or score marks 3 enabling the'units to be easily separated. By reason of the crescent shape, the inner surfaces, having the same radius as the outer surface, will fit closely upon the exterior surface of the preceding tile when stacked up, and any number of the tiles may thus be piled up and will nest perfectly without fracture, and. less space will be occupied. This construction of the die enables the manufacturer to produce in each operation, three or more tiles of crescent shape in each die, and the material may be cut into suitable lengths, as it emerges.

Having thus described my invention, what I. claim and desire to secure by Letters Patent isl. A. die including an outer member and an inner member spaced therefrom whereby to produce a hollow integral cylindrical tale, said outer member having a true cylindrical inner face and said inner member having a outer face composed of a'plurality of segments having the same radius as the radius of the inner face of the outer member and with their centers of curvature eccentric to the inner face of the outermembrr and having their ends meeting at common points, and means to form lines ofwealrening at said common points to allow the tile to be separated intoseetions which perfectly nest} 2. In the art of tile manufacture, means for forming a hollow integral cylindrical tile, means for shaping the inner face of said emergence from the andgreen state, I am enabled to pmri'phery and with their centers of eurvamy hand in the presence of two subscribing ture ectfmntrieh t0 the tile periphery, and witnesses; means or fmmin lines of \veukenin at the'respectivesegnlent ends to allow th: tile f 1 T 5 to be separated into sections vhieh perfectly Witnesses: v Y

nest. v d W. W. H ILEY, In testimony whereof I have hereunto set M. E. EWING, 

